Where to start?

[Ughmahedhurtz]

don't try to over-extend. Either 2-box mixed classes or 5-box all the same ranged class. Starting out with a mixed team or a melee team will be very frustrating. You need to ease into that.

Excellent advice, this. You'll want to reduce your variables at first so when something breaks, you aren't trying to herd three different cats.